Advanced Oxidation via Hydrodynamic Cavitation and Ozonation for Enhanced Decolorization and Biodegradability of Triazo Dyes in Textile Wastewater.

ABSTRACT: Textile wastewater containing azo dyes poses environmental and health risks if untreated. This study evaluated the decolorization of the azo dye Direct Blue 71 (DB71) using advanced oxidative processes (AOPs), specifically hydrodynamic cavitation (HC) and ozonation, both independently and in combination with biological treatments. HC as a pretreatment significantly improved DB71 biodegradability, achieving a 95.7% removal efficiency. Anaerobic batch tests showed that cavitation pretreatment doubled methane production (6.81 N mL-CH₄) compared to untreated wastewater (2.96 N mL-CH₄) and reduced dye removal time from 25 to 16 h. Thirteen central composite design experiments indicated organic carbon removal ranging from 7.6% to 58.3%, depending on the ozone flow rate (1.5

SUBMITTER: de Brito R 

PROVIDER: S-EPMC12750273 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature